The sides of a hexagon are produced in order. If the measures of exterior angles so obtained are (6x - 1)°, (10x + 2)°, (8x+ 2)°, (9x - 3)°, (5x + 4)° and (12x + 6)°, find each exterior angle.

The interior angles of a pentagon are in the ratio 4 : 5 : 6 : 7 : 5. Find each angle of the pentagon.

The figure given below shows a pentagon ABCDE with sides AB and ED parallel to each other, and ∠B : ∠C : ∠D = 5 : 6 : 7.

(i) Using formula, find the sum of interior angles of the pentagon.

(ii) Write the value of ∠A + ∠E.

(iii) Find angles B, C and D.

Two angles of a polygon are right angles and the remaining are 120° each. Find the number of sides in it.